Last year, I posted the following bug report on the IPv6 hackers mailing list, but nobody ever responded. I also sent it to Microsoft, but heart no response either. Since I am owning this blog since a few days, I will post it here, too:

Hello everybody,

I am testing with the THC-IPV6 Toolkit from van Hauser and noticed that Windows 7 adds and deletes several neighbor cache entries even on interfaces which are not connected. It further adds and deletes complete network interface cards from the neighbor cache. I would like to know if this is a feature or a bug.